BSNL is providing a prepaid plan with 90 days validity for just Rs.19. image credit: Google

The prepaid plan comes with a total of 50MB data. image credit: Google

Airtel's Rs 19 prepaid plan offers a total of 1GB data with 1 day validity. image credit: Google

Vodafone Idea's Rs 19 prepaid plan offers 1GB data with 24 hours validity. image credit: Google

Jio's Rs 26 prepaid plan offers 2GB data with 28 days validity and is limited to JioPhone users. image credit: Google

There is a top-up voucher of Rs 20, in which users get talk time of Rs 14.95. image credit: Google

BSNL offers the opportunity to increase the validity in such a small amount. image credit: Google

Other plans offer more data but not the validity like BSNL. image credit: Google

BSNL's prepaid plan is the most economical with greater validity. image credit: Google

BSNL provides the best value for money. image credit: Google